Atriangle has sides with lengths of 5x-7, 3x-4, and 2x-6. what is the simplified expression for t h e perimeter of the triangle?

△cde maps to △stu with the transformations (x, y) arrowright (x − 2, y − 2) arrowright (3x, 3y) arrowright (x, −y). if cd = a + 1, de = 2a − 1, st = 2b + 3 and tu = b + 6, find the values of a and b. the value of a is and the value of b is .

Acircle has a radius of 5/6 units and is centered at (3.6, 7.8) write the equation of this circle

X/y + 4y/x divided by x/y - 2y/x explain as in depth as you can how you simplfied the fractions. i don't know where to start on this : /